****PLEASE MAKE SURE THE CODE FOR THIS RUNS IN NETBEANS JAVA SE**** COMPREHENSIV

Question

****PLEASE MAKE SURE THE CODE FOR THIS RUNS IN NETBEANS JAVA SE****

COMPREHENSIVE

Zeller's congruence is an algorithm developed by Christian Zeller to calculate the day of the week. The formula is:

h = (q + 26(m+1)/10 + k + k/4 + j/4 + 5j) % 7

where

h is the day of the week (0: Saturday, 1: Sunday, 2: Monday, 3: Tuesday, 4: Wednesday, 5: Thursday, 6: Friday).

q is the day of the month.

m is the month (3: March, 4: April, ..., 12: December). January and February are counted as months 13 and 14 of the previous year.

j is the century (i.e., year/100)

k is the year of the century (i.e., year % 100).

Note that the division in the formula performs an integer division. Write a program that prompts the user to enter a year, month, and day of the month, and displays the name of the day of the week. Here are some sample runs:

Enter year: (e.g., 2012): 2015

Enter month: 1-12: 1

Enter day of the month: 1-31: 25

Day of the week is Sunday.

Explanation / Answer

DayOfTheWeek.java

import java.util.Scanner;

public class DayOfTheWeek {
    public static void main(String[] args) {
        // Create a Scanner
        Scanner input = new Scanner(System.in);

        // Prompt the user to enter a year, month and a day
        System.out.print("Enter year (e.g., 2012): ");
        int year = input.nextInt();
        System.out.println();

        System.out.print("Enter month: 1-12: ");
        int month = input.nextInt();
        System.out.println();

        System.out.print("Enter the day of the month: 1-31: ");
        int day = input.nextInt();
        System.out.println();

        // Check if the month is January or February
        // If the month is January and February, convert to 13, and 14,
        // and year has to -1. (Go to previous year).
        if (month == 1 || month == 2) {
            month += 12;
            year--;
        }

        // Compute the answer
        int k = year % 100; // The year of the century
        int j = (int)(year / 100.0); // the century
        int q = day;
        int m = month;
        int h = (q + (int)((26 * (m + 1)) / 10.0) + k + (int)(k / 4.0)
                + (int)(j / 4.0) + (5 * j)) % 7;

        String result = "Day of the week is ";

        //Display the name of the day of the week
        if (h == 0)
            System.out.print(result + "Saturday");
        else if (h == 1)
            System.out.print(result + "Sunday");
        else if (h == 2)
            System.out.print(result + "Monday");
        else if (h == 3)
            System.out.print(result + "Tuesday");
        else if (h == 4)
            System.out.print(result + "Wednesday");
        else if (h == 5)
            System.out.print(result + "Thursday");
        else
            System.out.print(result + "Friday");
    }
}

Output:-

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